Navigation Links
April 2009 Geology and GSA Today media highlights
Date:3/31/2009

In contrast, the enormous oceanic plateaus and the continental Karoo flood basalts had lesser effects on the biosphere. The cooling effect of volcanic ash and sulphate aerosols injected into the stratosphere during Plinian eruptions may be the main cause of mass extinctions, but the volume of erupted basalt of each large igneous province does not correlate well with the extent of mass extinction. An alternative explanation is that the global climatic changes are related to the volatiles released during low-temperature contact metamorphism of the intruded rocks. Ganino and Arndt studied the Emeishan flood basalts that intruded a dolomitic basin, and calculated that the amount of sediment-derived carbon dioxide (CO2) was three times more than magmatic CO2 released from the Emeishan lavas and intrusions. The vented CO2 would have led to greenhouse conditions and intense global warming. Ganino and Arndt propose that the thermal decomposition of anhydrite, salt, limestone, hydrocarbons, and coal in other provinces provided a toxic cocktail that caused other mass extinctions. The Karoo and other provinces had little to no environmental impact because they were emplaced in sterile magmatic or sedimentary rocks.


Bedform-velocity matrix: The estimation of bottom current velocity from bedform observations
Dorrik A.V. Stow et al., IPE-ECOSSE, Heriot Watt University, Edinburgh EH14 4AS, UK. Pages 327-330.

Deep-ocean currents continuously sculpt the seafloor beneath their course. In places, they generate ripples, sand waves, and giant mud waves over the backs of huge sediment mounds, while elsewhere they erode deep furrows and broad channels. Stow et al. have synthesized a large amount of published data, together with their own observations, to clearly document the link between current velocity and the type of seafloor feature (or bedform) generated. This will allow other ocean scientists to better ch
'/>"/>

Contact: Christa Stratton
cstratton@geosociety.org
303-357-1093
Geological Society of America
Source:Eurekalert

Page: 1 2 3 4 5 6 7 8 9 10 11

Related biology news :

1. Stevens Center for Science Writings presents: Ravens at the Feast, with Bernd Heinrich, April 1
2. NAS annual meeting, April 25-28
3. American Chemical Societys Weekly PressPac -- April 30, 2008
4. Stevens Center for Science Writings honors environmental critics with Green Book Award, April 30
5. American Chemical Societys Weekly PressPac -- April 23, 2008
6. Energy Crossroads conference April 30 and May 1 at Stanford University
7. American Chemical Societys Weekly PressPac -- April 16, 2008
8. Story tips from the Department of Energys Oak Ridge National Laboratory, April 2008
9. Vanishing polar ice talk to be Webcast live, April 10
10. NASA expert to address Earths vanishing polar ice, April 10, at UD
11. 5th Annual World Health Care Congress April 21-23, Washington, D.C.
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/1/2014)... take a healthy salad up a level by growing ... in leafy greens. , "In the long run, one ... the salad or making a pill from the plant ... at Case Western Reserve School of Medicine and leader ... cancer organization is funding the research with a three-year, ...
(Date:9/30/2014)... of moorland burning is published today in the first ... of relieving tensions on both sides of the grouse ... Moorland Burning on the Ecohydrology of River basins) project ... practised predominantly to support red grouse populations for gun ... chemistry and physical properties, river water chemistry and river ...
(Date:9/30/2014)... WASHINGTON, D.C., September 30, 2014--Sea monkeys have captured the ... of their easily observable life cycle -- sold as ... and mate given little more than a tank of ... a shorter-term pattern: Like other zooplankton, brine shrimp vertically ... conditions, coming closer to the surface at night and ...
Breaking Biology News(10 mins):Scientists wield plant viruses against deadly human disease 2Scientists wield plant viruses against deadly human disease 3Grouse moor burning causes widespread environmental changes 2Laser-guided sea monkeys show how zooplankton migrations may affect global ocean currents 2
... responses, including insect outbreaks, wildfire, and forest dieback, may ... plants and animals. The U.S. Geological Survey ... warming world on "ecological thresholds" in North America. The ... Science Program and authored by a team of federal ...
... happening at a greater rate than other places in ... in the future. As a result, glacier and ... rise can be expected to continue. A new ... the first time the pervasive nature of Arctic climate ...
... epidemica (NE) has been linked to increases in the ... increased seedcrop production by broadleaf trees. Research published in ... Geographics links outbreaks of this rodent-borne disease to ... from the Department of Microbiology & Immunology at Belgium,s ...
Cached Biology News:Arctic heats up more than other places 2Global warming linked to European viral epidemic 2
(Date:10/1/2014)... 30, 2014 In response to ... to address sales, training and consumer engagement challenges, ... innovative mobile applications to turn their clients’ visions ... latest customized mobile app creations, are now featured ... In partnership with Toyota, StudioPMG created a robust ...
(Date:10/1/2014)... TeselaGen Biotechnology has received ... expand their bioCAD/CAM software suite, which uses synthetic ... Small Business Innovation Research Phase II grant will be ... license from the Lawrence Berkeley National Laboratory. j5 was ... LBNL laboratory that develops alternative fuel technologies for the ...
(Date:9/30/2014)... is available in German . ... several quantum dots in a semiconductor layer. Quantum dots are ... atomic processes. If a short laser pulse is fired at ... quantum dot experiences a change in the electromagnetic field around ... emission of light by the dot. As soon as the ...
(Date:9/30/2014)... NEW YORK , Sept. 30, 2014 /PRNewswire/ ... Review - 2014 Summary Global Markets ... Review - 2014, provides an overview of the ... focus. This report provides comprehensive information on ... Biotechnology, LLC,s, complete with comparative analysis at various ...
Breaking Biology Technology:Digital Agency Studio PMG Launches New Case Studies on Website 2TeselaGen Receives $750k NSF SBIR Phase II Award 2TeselaGen Receives $750k NSF SBIR Phase II Award 3Ultrafast remote switching of light emission 2Pacific Northwest Biotechnology, LLC - Product Pipeline Review - 2014 2Pacific Northwest Biotechnology, LLC - Product Pipeline Review - 2014 3
... BioSpace launched the ... showcasing biotechnological, pharmaceutical and medical device companies ... (Logo: http://photos.prnewswire.com/prnh/20040907/CLTU006LOGO) (Logo: http://www.newscom.com/cgi-bin/prnh/20040907/CLTU006LOGO) ... organizations within Oregon, Washington, Idaho and Montana ...
... Ridge Diagnostics, Inc., a neurodiagnostic company, announced that ... proprietary blood test for Major Depressive Disorder (MDD)  will ... Acceptance and Utility of a Multianalyte Biomarker Panel for ... The blood test, for the first time,  provides clinicians ...
... the second year in a row, a pair of ... Manufacturing Design Competition held by the American Society of ... Casey Hoffman and Jaron Kuppers won top honors in ... Elastomeric Tooling (SET) process. The SET process offers a ...
Cached Biology Technology:BioSpace Highlights the Northwest's Growing Life Science Region 2Ridge Diagnostics, Inc. Presents Clinical Data on Blood Test for Depression at U.S. Psychiatric and Mental Health Congress 2Rensselaer mechanical engineers win first place at ASME student manufacturing design competition 2Rensselaer mechanical engineers win first place at ASME student manufacturing design competition 3Rensselaer mechanical engineers win first place at ASME student manufacturing design competition 4